They've had hundreds of millions of years to practise, so you'd be right to think that sharks know a thing or two about navigating the ocean depths. But a clever manoeuvre used by one particular species has surprised marine biologists, who discovered that hammerhead sharks spend much of their time swimming sideways to conserve energy.
.. Continue Reading Energy efficient hammerhead sharks swim sideways to cut down on dragCategory: Biology
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via http://www.gizmag.com/
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